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Test ID FEWG4 Egg White IgG4

Method Name

Enzyme Immunoassay (FEIA)

Reporting Name

Egg White IgG4

Specimen Type


Specimen Required

Draw blood in a plain red-top tube(s), serum gel tube(s) is acceptable. Spin down and send 0.5 mL of serum refrigerated in a plastic vial.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 28 days
  Frozen  365 days
  Ambient  7 days

Reference Values

<0.15 mcg/mL


The reference range listed on the report is the lower limit of quantitation for the assay. The clinical utility of food-specific IgG4 tests has not been clearly established. These tests can be used in special clinical situations to select foods for evaluation by diet elimination and challenge in patients who have food related complaints, and to evaluate food allergic patients prior to food challenges. The presence of food-specific IgG4 alone cannot be taken as evidence of food allergy and only indicated immunologic sensitization to the food allergen in question.

Day(s) and Time(s) Performed

Monday, Wednesday, Friday

Performing Laboratory

Viracor Eurofins

Test Classification

This test was developed and its performance characteristics determined by Viracor Eurofins. It has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FEWG4 Egg White IgG4 56253-8


Result ID Test Result Name Result LOINC Value
FEWG4 Egg White IgG4 56253-8